“Notorious” (Travel Channel 8 p.m.) Travel Channel’s new series concentrates on all the reasons why you wouldn’t want to visit a place. Tonight: San Francisco with the Zodiac Killer, the murder of Harvey Milk and the Fatty Arbuckle rape scandal.

“Treasure Quest” (Discovery 8 p.m.) Real-life treasure hunters hope to unearth lost fortunes. First up: sunken gold in the English Channel. Hey, it could happen.

Friday 16

“Friday Night Lights” (KOB-4 8 p.m.) NBC finally gets around to airing the new season, which premiered last year on DirectTV.

“Battlestar Galactica” (Sci-Fi 8 p.m.) The final episodes hit the airwaves, a scant 217 days after last season’s apocalyptic finale. It’s about fraking time!

Saturday 17

The Immortal Voyage of Captain Drake (Sci-Fi 7 p.m.) “Highlander” dude Adrian Paul returns as Sir Francis Drake, who’s racing around the globe searching for a mystical cure for a sultan’s dying son. ... Funny, I don’t remember that incident in the history books.

Sunday 18

“Big Love” (HBO 7 p.m.) HBO celebrates polyamory and Jesus love with a third season of “Big Love.”

“The L Word” (Showtime 7 p.m.) The final season of Showtime’s L.A.-is-for-lesbians drama gets underway with the first of eight episodes.

“The United States of Tara” (Showtime 8 p.m.) From producer Steven Spielberg and writer Cody Diablo (Juno) comes this new comedy series about a suburban housewife (Toni Collette) with multiple personalities.